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A kind of preparation method of nonionic ultraviolet light curing waterborne polyurethane acrylate

A polyurethane acrylate, non-ionic technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of easy degradation and deterioration, short shelf life of non-ionic water-based polyurethane, and achieve environmental friendliness, good storage stability, The effect of expanding the range of application

Active Publication Date: 2016-09-07
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN102432992A pointed out that after repeated experiments, the shelf life of non-ionic water-based polyurethane obtained by using trimethylolpropane polyethoxy ether is very short, and it is easy to degrade and deteriorate during storage

Method used

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  • A kind of preparation method of nonionic ultraviolet light curing waterborne polyurethane acrylate
  • A kind of preparation method of nonionic ultraviolet light curing waterborne polyurethane acrylate
  • A kind of preparation method of nonionic ultraviolet light curing waterborne polyurethane acrylate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Synthesis of a chain extender with two hydroxyl groups with a hydrophilic long-chain polymer in the side chain

[0034] Take 11.12 grams (0.05mol) of isophorone diisocyanate into a three-necked flask, and take 50 grams of polyethylene glycol monomethyl ether (molecular weight: 1000, 0.05mol), add 0.018 grams of catalyst dibutyltin dilaurate, in Add dropwise at 45°C, react for 2 hours, until the NCO group content measured by the toluene-di-n-butylamine method reaches the theoretical value of 3.44%, add 5.26 g (0.05mol) of diethanolamine, raise the temperature to 50°C, and continue the reaction for 2 hours , until the NCO characteristic absorption peak disappears and stops when measured by a Fourier transform infrared transform spectrometer;

[0035] (2) Synthesis of non-ionic UV-curable waterborne polyurethane acrylate prepolymer

[0036] Add 100 grams (0.1 mol) of polytetrahydrofuran ether glycol (PTMG) with a number average molecular weight of 1000 and a hydroxyl ...

Embodiment 2

[0040] (1) Synthesis of a chain extender with two hydroxyl groups with a hydrophilic long-chain polymer in the side chain

[0041] As shown in embodiment 1 step (1);

[0042] (2) Synthesis of non-ionic UV-curable waterborne polyurethane acrylate prepolymer

[0043] Add 100 grams (0.1 mol) of polyoxypropylene glycol (PPG) with a number average molecular weight of 1000 and a hydroxyl value of 110 mgKOH / g, and 44.4 grams (0.2 mol) of isophorone diisocyanate (IPDI) into the reaction vessel, React for 3 hours under the action of mechanical stirring at 40°C; after the NCO content measured by the toluene-di-n-butylamine method reaches 8.90%, add 66.3 grams of the chain extender prepared in (1), and heat up to 55°C for 2.5 hours; the NCO content After reaching 2.71%, add 13 grams (0.1mol) of photosensitive monomer hydroxyethyl methacrylate (HEMA) with unsaturated double bonds and raise the temperature to 65°C for 2 hours until the NCO is measured by Fourier transform infrared spectro...

Embodiment 3

[0047] (1) Synthesis of a chain extender with two hydroxyl groups with hydrophilic groups on the side chain

[0048] As shown in embodiment 1 step (1);

[0049] (2) Synthesis of non-ionic UV-curable waterborne polyurethane acrylate prepolymer

[0050] Add 100 grams (0.1 mol) of polycaprolactone diol (PCL) with a number average molecular weight of 1000 and a hydroxyl value of 109-119 mgKOH / g, and 44.4 grams (0.2 mol) of isophorone diisocyanate (IPDI) into the reaction In the container, react under mechanical stirring at 50°C for 1 hour; after the NCO content measured by the toluene-di-n-butylamine method reaches 8.90%, add 66.3 grams of the chain extender prepared in (1), and heat up to 60°C for 2 hours ; After the NCO content reaches 2.63%, add 13 g (0.1 mol) of photosensitive monomer hydroxyethyl methacrylate (HEMA) with unsaturated double bonds and heat up to 70 ° C for 1.5 hours, until the Fourier transform infrared spectrometer It is measured that the characteristic abso...

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Abstract

A method for preparing non-ionic UV-curable water-based polyurethane acrylate, the specific preparation steps are as follows: (1) Under the action of a catalyst of 40-50°C, polyethylene glycol monomethyl ether is reacted with an isocyanate compound catalyst for 1- 3 hours, then add polyhydroxy secondary amines in the same molar amount as the isocyanate compound at 50-60°C; (2) react the diol and isocyanate compound with the catalyst at 40-50°C, and add step (1) to obtain chain extender, react at 50-70°C for 1-3 hours, add photosensitive monomer acrylate in the same molar amount as diol and react at 60-70°C; (3) prepolymer obtained in step (2) Add deionized water and photoinitiator under stirring to emulsify for 1-2 hours. The synthesis process of the method is simple, the conditions are controllable, and the obtained emulsion has good storage stability and high solid content, and can be used for functional coatings, fabric finishing agents and the like.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to two methods for preparing ultraviolet-curable water-based polyurethane acrylate. Background technique [0002] UV-cured water-based polyurethane combines the advantages of light-cured technology and water-based coatings, and has the advantages of high efficiency, energy saving, environmental protection, economy and wide adaptability. extensive attention of researchers. In recent years, anionic and cationic water-based polyurethanes have been studied more, because they contain ionic groups, have good hydrophilicity, are easy to emulsify, and have good emulsion storage stability, but ionic UV-curable water-based polyurethanes are harmful to electrolytes. etc. are relatively sensitive, so they are limited in applications with electrolytes. Non-ionic water-based polyurethane does not have ionic groups, so it has good stability to acids, alkalis, and salts, and has no doub...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/48C08G18/67C08J3/03C08G18/44C08G18/42C09D175/14
Inventor 刘晓亚袁妍刘敬成张燕刘仁李治全张胜文
Owner JIANGNAN UNIV
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